Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
Folding Type Non-folding, Battery Voltage 36V, Wheel Number 4 Wheel, Motor 2x Brushless Motors, Tire Size 200x 50mm, Gradeability 25°, For Office Workers, Size 115x 42x 23cm / 45.28x 16.54x 9.06 inches, Battery 36V 11AH 10S5P Li-ion Battery, Input Voltage AC 100-240V, Maximum Mileage 20km, Charger Type US plug, Seat Type Without Seat, Max Payload 200kg, Weight 14kg, Max Speed 38km/h, Battery Capacity 10000mAh, Motor Rated Power 2x 1650W, Charging Time 6 Hours, Pedal Ground Clearance (no weight bearing) 14cm, Teenagers
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Europe 
. I can’t tell you if this price is good – not enough records in my database, so I won’t judge.
Link: Banggood product page
1. ($549.99): JH2C2021
2. ($549.99): BGJINGMS
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGJK01, PICODICOM, BGH2C01, 5d1752, BGJKH2CCN11, BGJKH2CCNB5, bGpAnDacHeCk, issamjking1, BGJKH2CCN, Wholesale20, 7bcdf9, BGAFF7OFF, BG7PJKH2CCN, BGBSJKH2CCN, BGEBSC15
(probably won’t work, but you can try them out)
Price history and price alert
There is only one database record (it was for $549.99), so you can’t see price history chart.
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).